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Re: 89 sa50 wont go over 25-30
Posted: Fri Mar 30, 2012 2:28 pm
by eliteguy50
damnSA50 wrote:135 shipped for the leovince pipe, not bad, Im going to see what Im working with in terms of funds and maybe get it today. I didnt know there was a pipe for our af05es. neat. thanks for the help!
SIPs shipping estimator is low. I don't remember how far, maybe $20 off. Just fyi for when you go to "checkout"
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 9:38 am
by swimmingfree
WELL
damnSA50 how it going did you close the gap on the plug move the pin to the middle and read the number on the jet????
swimmingfree
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 11:57 am
by Bear45-70
If you have a BBK install and it is still this sluggish, do a compression test and quit screwing around worrying about rollers and s***. You said yourself the engine is missing.
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 12:59 pm
by damnSA50
Im not near the bike, its about 30 miles away so its kinda hard. I live near the ghetto so I keep my toys at my moms in a nice neighborhood. literally people steal scrap metal from the welding company next door.
There is no marking on the malossi jet also. So with out a feeler set I have no clue what it is. I asked Keith/redeft he said he wasnt sure either.
I checked another plug I have here and its 28 gap in the box. Id assume the other plug is 28 as well.
its not sluggish, it goes great till around 4k rpm/ 15 mph it seems. Then seems like it misses or falls on its face I should say. Ill have an OKO 24mm carb and ct intake as soon as it gets here. I bought it off of veedub a few days or so ago.
I would imagine compression is pretty high since the starter will barely turn it over. kick starts really great first kick. Next time Im at the bike ill do a compression test of course, but like i said its a little drive away.
Has anyone else bought the malossi bbk for the af05e and noticed the exhaust port on it isnt round? Its more of a "D" shape, a "D" on its side tho. I just imagine its the way they designed it, but maybe it is a casting flaw and the exhaust port is suppose to be round? and maybe thats what limiting my revs. Something is limiting them for certain. Next time Im out there Ill take pictures of the port as im going to be welding a different exhaust pipe on it.
Next time I go out there is when I get this carb and intake.
And of course,
check change/ plug gap
change needle slot
install my polini rollers I just got (which I already assume wasnt the problem since I removed 3 and still same issue)
instal carb & intake
check compression
weld up a new exhaust
and try to start it with out the belt installed to see if thats dragging the starter. The belt looks "thin" compared to the belts I see on other peoples bikes. and it "squeeks" as i try to rotate the crank with the cover off, as if the belts being pinched.
Ill be taking a video of it running and some pics of the exhaust port on the malossi when I get out there. Only problem is I have a high def camera and the pics are always too large to DL or something. And I dont have the patience to down size them. I honestly hate computers.
Ive done a taiwan 72cc BBK on a madame maxxi 50cc that is a yamaha jog clone style engine, and all the exact same mods minus the gears, and I didnt have any issues. exactly the same set up, just using sh*t taiwan parts instead of expensive italian parts. I used stock carb tho with a 102.5 jet and stock exhaust gutted just how I did this time. But this is a smaller displacement I know so maybe its too free flowing. gah itll be something or another.
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 1:44 pm
by Bear45-70
Oh great, you can't get it to run with this setup so you are gonna add a CT intake and an OKO carb. Good luck with that.
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 1:52 pm
by swimmingfree
wood like to no the bore you got??? if its 48mm your compassion will go from 6.9:1 to about 8.5:1 and the higher the compression the harder it is for the spark plug to fire .. bring down the gap to 24 and you may lose the sputter ..
i do no your not were it is but when you get there
swimmingfree
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 1:53 pm
by damnSA50
It didnt run when I got it, had a hole in the piston and missing the top ring, so where its at now is 100% better.
It runs, idles, and accelerates. I said it before. It will not however go past any kind of high rpm.
regardless of how it is now, it will have the ct intake and 24mm carb on it in the end. So Im going to tune it as its going to end.
Its the big bore kit from redeftperformance, I think its 47mm. It comes with a metal head gasket and an O ring, he said, and the booklet confirms, that you only use the O ring. If its over 170 psi I think Ill use that metal gasket also.
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 1:55 pm
by fastplastic
i don't feel like reading everything just skimmed it.... falls on its face at 15mph? that sounds lean to me.... now what do you have for an air box/exhaust?
could be a restriction in the exhaust when you gutted how did you do it and could something be plugin it up?
p.s. first thing should be compression check... to high of compression is bad too (sometimes)
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 2:07 pm
by fastplastic
now that i have fully read though.... your exhaust has baffles for a reason (4 strokes don't that stuff) exhaust is number 1 problem next, jet for stock carb is for stock air box as well do you have the stock air box on it?
when you leo vince comes in this is a washer in the exhaust for stock bores make sure you take that out (this will save you a ton of time)
24mm carb you have to start from probably wheelmans suggestion on jetting different sized carbs require different sized jets...
don't get upset at bear (not saying you are) but adding new parts will only make it even harder to find the original problem...
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 2:46 pm
by damnSA50
Nah I dont get upset. Itll be figured out eventually.
Im running stockish air box and stock carb with malossi jet. the stock air box has been opened up, like this.
http://www.ebay.com/itm/PERFORMANCE-AIR ... 3f098bbe7d
I have a set of jets for the new carb also, mains and pilots. also didnt know it but I have a huge assortment already in my motobox.
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 2:49 pm
by fastplastic
its a lean condition that you are fighting, your allowing to much air in....
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 3:33 pm
by Red Eft Performance
One thing that concerns me is the engine had a piston with a hole in it. So something was already wrong with the motor to cause the hole in the piston. Did you figure out why there was a hole in the piston?
As always I highly recommend you pressure test the motor before starting the tuning process. To make sure you dont have any air leaks its a great way to check the crank seals and all the gaskets on the motor. (Especially since the original piston had a hole in it.)There is nothing more frustrating trying to tune around a air leak. Make sure you have a proper exhaust.
The jet that is supplied with the kit isnt the perfect jet. It is a starting point at best. Need to tune the carb. different for each different motor,temperature,elevation,ect.. You just cant hack the exhaust and hack the air box and expect the jet that came with the kit to work right.
Good you have the OKO coming so you can adjust pilot circuit and have more mains to try.
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 3:47 pm
by fastplastic
he's right you could have a huge air leak and not know it... the gutted air box is a huge problem as well though...
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 5:59 pm
by damnSA50
The guy ran it with out 2 stroke oil in it and thats what happened to it, he thought it was an oil light as in crank case oil. Thats why I got it for free.
Re: 89 sa50 wont go over 25-30
Posted: Sat Mar 31, 2012 11:15 pm
by Bear45-70
damnSA50 wrote:The guy ran it with out 2 stroke oil in it and thats what happened to it, he thought it was an oil light as in crank case oil. Thats why I got it for free.
I've never seen lack of oil burn a hole in a piston. If that is the story, I call BS!